Question

[1, 1, 1, 2, 2, 3].count(True)

>>> 3

Why does this return 3 instead of 6, if bool(i) returns True for all values i not equal to 0?

Answer 1

In [33]: True == 1
Out[33]: True

In [34]: True == 2
Out[34]: False

In [35]: True == 3
Out[35]: False

True and False are instances of bool, and bool is a subclass of int.

From the docs:

[Booleans] represent the truth values False and True. The two objects
representing the values False and True are the only Boolean objects.
The Boolean type is a subtype of plain integers, and Boolean values
behave like the values 0 and 1, respectively, in almost all contexts,
the exception being that when converted to a string, the strings
“False” or “True” are returned, respectively.